"Zhonghe Collection" was written by Yingchanzi Li Daochun in the late Song Dynasty and early Yuan Dynasty.
Volume 1, "The Purpose of Xuanmen", contains diagrams and hymns such as "Tai Chi Diagram", "Zhonghe Diagram", and "Wei Shun Diagram", with the main theme discussing "Tai Chi" and "Tao"; Volume 2 describes Neidan; Volume 3 contains Q&A quotations; Volume 4 contains "The Theory of Life and Life", "The Theory of Guaxiang Xiang", "The Theory of Death and Life", "The Theory of Movement and Stillness", etc. To explain the meaning; Volumes 5 and 6 collect poems and cryptic words, which contain the theory of life and life and the purpose of the inner elixir.
Yingchanzi took the meaning of "Book of Rites" that "the happiness, anger, sorrow, and joy are not expressed in the middle, but when they are expressed, they are all in the middle, and they are in harmony." He believes that when they are not expressed, it is called tranquility; when they are expressed in the middle, it is said to be in motion, so be careful about what you say, so the sun is harmonious; everything is in the middle, so it is called the way of the world. Sincerity can bring about harmony in the whole body, then the original body will be empty but spiritual, still and aware, active and upright, so it can make endless changes in the world. It takes "neutralization" as its purpose, saying that the three teachings of life and life can be summed up in the word "neutralization". "Tao" is used as the body, "Yi" is used as the function, and "Dan" is used to connect the three teachings. "Benzhou continuation manuscript·Shuhe Jihou": "This book refers to all the internal and external elixirs, such as "Huang Ting", "Shen Tong", "Wuzhen", etc., As side paths, and its main purpose is mostly from Zen." It is recorded under the "Guang" subtitle in the Dongzhen Department of "Tao Zang" in the Ming Dynasty. Bai Yunji's "Detailed Notes on the Catalog of the Taoist Canon" said: "This book can be said to be the most comprehensive guide to Confucianism and Buddhism."
